If Seymour is going to guide devil-people to the de-deviling lake, he may become an actual threat for Big D.

i don't know - the lake didn't seem to work out for him too well with pebbles.

If the lake doesn't work then there's always the Lethe. An amnesiac devil girl + Soul Brotha' Seymour=I don't know, a new couple? And also Miss M's undying rage .
Anyways, as much as I'd like to see that, I don't think it will ever happen.

If Seymour is going to guide devil-people to the de-deviling lake, he may become an actual threat for Big D.

i don't know - the lake didn't seem to work out for him too well with pebbles.

If the lake doesn't work then there's always the Lethe. An amnesiac devil girl + Soul Brotha' Seymour=I don't know, a new couple? And also Miss M's undying rage .
Anyways, as much as I'd like to see that, I don't think it will ever happen.

Destroy the personality. Let the light of Jesus fill you. The old you will be no more. You will no longer be capable of sin.

I doubt that it was the lethe, because if so then Seymour should probably be an amnesiac much like Li'l E currently is...

Honestly I kind of figured that the lake cured whatever you wanted to be cured. Seymour wanted the horns and tail gone, but Pebbles likely wanted to be able to actually speak. But I dunno... There isn't really anything to support that, honestly..._________________Character Chart | Terminology Dictionary | Flashback Strips

Personally I think the lake had little to do with it beyond being the scene setting, the dragon was the one that dehorned Seymour and if there was any effect on Pebbles it was probably a lingering effect of that rather than anything in the lake itself.